Vehicle seat

ABSTRACT

There is provided a vehicle seat including: a seat main body having a major surface facing a user seated; a first air passage extending from an air conditioning device of a vehicle toward the seat main body so as to guide air from the air conditioning device to the seat main body; an outlet communicating with the first air passage and opened toward a first region of the major surface through the seat main body; a second air passage having an inlet which is opened toward a second region of the major surface through the seat main body so as to suck air from the second region; and a blower configured to suck air in the second air passage.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority from Japanese Patent Application No.2015-106639 filed on May 26, 2015, the entire contents of which areincorporated herein by reference.

TECHNICAL FIELD

The present disclosure relates to a vehicle seat mounted on a vehiclesuch as an automobile, a train and an airplane.

BACKGROUND

JP-A-H05-213056 discloses an air conditioning device for a seat providedin an automobile. The seat has a seat cushion, a seat back coupled to arear portion of the seat cushion, and a headrest coupled to an upperportion of the seat back. The air conditioning device has an outlet inan upper portion of the headrest and an inlet in a side portion of theseat back and a side portion of the seat cushion. The outlet isconfigured to blow out cold air or warm air downward from the upperportion of the headrest. The inlet is opened upward in the side portionof the seat cushion or opened laterally in the side portion of the seatback such that there is no hindrance to a user seated on the seat.

By using a blower fan provided at a lower side of the seat, air issucked from the inlet via an intake duct. The air is cooled or warmed bya cooler or heater provided at the downstream of the blower fan. Thecold air or warm air is blown out from the outlet via a discharge ductand is again sucked from the inlet. Therefore, the surroundings of theuser seated on the seat can be intensively air-conditioned. Further, aheat exchanger is also provided for performing the heat exchange betweenthe cold air or warm air passing through the discharge duct and the airpassing through the intake duct. In this way, the seat can be cooled orheated by using the intake duct.

However, a technique of warming or cooling a user seated on a seat byusing a method different from related art or using a smaller energy hasbeen demanded.

SUMMARY

According to an aspect of the present disclosure, there is provided avehicle seat including: a seat main body having a major surface facing auser seated; a first air passage extending from an air conditioningdevice of a vehicle toward the seat main body so as to guide air fromthe air conditioning device to the seat main body; an outletcommunicating with the first air passage and opened toward a firstregion of the major surface through the seat main body; a second airpassage having an inlet which is opened toward a second region of themajor surface through the seat main body so as to suck air from thesecond region; and a blower configured to suck air in the second airpassage.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a perspective view of a vehicle seat;

FIG. 2 is a sectional view taken along a line II-II shown in FIG. 1;

FIG. 3 is a plan view of the vehicle seat; and

FIG. 4 is a sectional view taken along a line IV-IV shown in FIG. 1.

DETAILED DESCRIPTION

An embodiment of the present disclosure will be described with referenceto FIGS. 1 to 4. As shown in FIG. 1, a vehicle seat 1 is mounted on afloor 41 of a vehicle such as an automobile, a train, an airplane and avessel. The vehicle seat 1 has a seat cushion 2 for supporting a hip ofa user 40 (see FIG. 4) and a seat back 3 for supporting a back of theuser 40.

As shown in FIGS. 1 and 2, the seat cushion 2 has a frame 2 a, a pad 2 bmounted on the frame 2 a and a seat cover 2 c covering the pad 2 b. Theframe 2 a has a rectangular frame main body extending along an outerperiphery of the seat cushion 2 and an elastic member suspended from theframe body and elastically supporting the pad 2 b. The pad 2 b is formedof foam urethane or the like. The seat cover 2 c is made of fabric orleather.

As shown in FIGS. 1 and 2, the seat back 3 has a frame 3 a, a pad 3 bmounted on the frame 3 a and a seat cover 3 c covering the pad 3 b. Theframe 3 a has a rectangular frame main body extending along an outerperiphery of the seat back 3 and an elastic member suspended from theframe body and elastically supporting the pad 3 b. A lower portion ofthe frame 3 a is coupled, in an angle adjustable manner, to a rearportion of the frame 2 a of the seat cushion 2 by a recliner 8.

As shown in FIG. 1, the seat cushion 2 is longitudinally movablyattached to the floor 41 by two slide devices 4. The slide device 4 hasa lower rail 4 a, an upper rail 4 b slidably attached to the lower rail4 a and a bracket 4 c attaching the lower rail 4 a to the floor 41. Theupper rail 4 b slides relative to the lower rail 4 a by an actuator 4 d.The actuator 4 d has a motor which is controlled by a switch 6.Therefore, the operation of the switch 6 allows the vehicle seat 1 tomove longitudinally relative to the floor 41.

As shown in FIG. 1, the switch 6 is provided to a side shield 5. Theside shield 5 is attached to a side portion of the seat cushion 2 andcovers a lower region of the side portion of the seat cushion 2. In thisway, the design of the vehicle seat 1 is improved. A plurality ofswitches 6 is provided in the side shield 5. The recliner 8 iscontrolled by one switch 6, so that an angle of the seat back 3 relativeto the seat cushion 2 can be adjusted. A lifter (not shown) is providedin the seat cushion 2. The lifter is controlled by one switch 6, so thata height of the seat cushion 2 can be adjusted.

As shown in FIG. 1, a front shield 7 is provided to the front portion ofthe seat cushion 2. The front shield 7 is attached to the seat cushion 2and covers a lower region of the front portion of the seat cushion 2. Inthis way, the design of the vehicle seat 1 is improved.

As shown in FIGS. 1 to 3, a mechanism for warming or cooling the user 40by using air from an air conditioning device 10 is provided in the seatcushion 2 and the seat back 3. The air conditioning device 10 isprovided in a main body of a vehicle, such as an engine room of anautomobile. The air conditioning device 10 receives air, cools or warmsthe air and blows out the air to the interior of the vehicle. A guideduct 11 for guiding the air exhausted from the air conditioning device10 to the vehicle seat 1 is coupled to the air conditioning device 10.One end of the guide duct 11 is coupled to the air conditioning device10 and the other end thereof is coupled to a distributor 12 attached toa lower side of the seat cushion 2.

As shown in FIGS. 2 and 3, a discharge duct 13 is coupled to thedistributor 12. The discharge duct 13 has a pipe 13 a extending from thedistributor 12 and a hole 13 b formed in the pad 2 b. The hole 13 b hasan outlet 13 c facing the seat cover 2 c. The outlet 13 c is located ata central region of the rear portion of the seat cushion 2. The pad 2 bmay be provided with one outlet 13 c elongated in a left-right directionor may be provided with a plurality of outlets 13 c arranged in theleft-right direction. The central region of the rear portion of the seatcushion 2 is a first region 2 e which receives a relatively highpressure when the user 40 is seated on the seat cushion 2 (see FIG. 1).

As shown in FIGS. 3 and 4, a discharge duct 14 is coupled to thedistributor 12. The discharge duct 14 extends from the distributor 12toward the side portion of the seat cushion 2, specifically, toward thefront portion of the side shield 5. The discharge duct 14 is coupled toa second duct 15 extending longitudinally along an upper portion of theside shield 5. The second duct 15 is communicating with a plurality offirst outlets 16 formed in the upper portion of the side shield 5.

As shown in FIGS. 3 and 4, the first outlets 16 are opened upward.Therefore, the air from the air conditioning device 10 (see FIG. 2) isblown out upward along the side portion of the seat cushion 2 from thefirst outlets 16 (primary air stream A). The air along the side portionof the seat cushion 2 flows along the side portion and upper surface ofthe seat cushion 2 or the user 40 by a Coanda effect. In this way, theair from the air conditioning device 10 is blown to the vicinity of theuser 40. The first outlets 16 and the side shield 5 are provided at bothleft and right sides of the seat cushion 2.

As shown in FIG. 3, a discharge duct 17 is coupled to the distributor12. The discharge duct 17 extends from the distributor 12 toward theside portion of the seat back 3. A first outlet 18 is coupled to an endportion of the discharge duct 17. As shown in FIG. 1, the first outlet18 is provided in the side portion of the seat back 3. The first outlet18 has an opening 18 a which is vertically elongated along the sideportion of the seat back 3 and opened forward. Therefore, the air fromthe air conditioning device 10 (see FIG. 2) is blown out forward alongthe side portion of the seat back 3 from the first outlet 18 (primaryair stream A). The air flows along the side portion and front surface ofthe seat back 3 or the user 40 by the Coanda effect. In this way, theair from the air conditioning device 10 is blown to the vicinity of theuser 40. The first outlet 18 is provided at both left and right sides ofthe seat back 3.

As described above, the air from the air conditioning device 10 (seeFIG. 2) is blown to the user 40 through the seat cover 2 c from theoutlet 13 c in the rear portion of the seat cushion 2. Furthermore, theair from the air conditioning device 10 is also blown out from the firstoutlets 16 in the side portion of the seat cushion 2 and the firstoutlets 18 in the side portion of the seat back 3 (air stream D shown inFIG. 1). Therefore, the air from the air conditioning device 10 isprimarily blown out toward the user 40 from the vehicle seat 1.

As shown in FIGS. 1 and 2, a structure for sucking the air blown out isprovided in the seat cushion 2 and the seat back 3. A hole 22penetrating in a thickness direction is formed in the pad 2 b of theseat cushion 2. The hole 22 has an inlet 22 a facing the seat cover 2 c.A plurality of holes 22 is provided in a major surface 2 d of the seatcushion 2. The major surface 2 d is a region which faces the user 40when the user 40 is seated on the vehicle seat 1. Specifically, themajor surface 2 d is a region excluding the left and right regions onthe upper surface of the seat cushion 2. The left and right regions arebulged upward from the major surface 2 d. Meanwhile, the holes 22 may beprovided also in the left and right regions.

As shown in FIG. 1, the major surface 2 d receives a pressure when theuser 40 is seated. The major surface 2 d has a first region 2 e whichreceives a high pressure from the user 40 and a second region 2 f whichreceives a pressure lower than that of the first region 2 e. The firstregion 2 e is a portion corresponding to a portion under a hip of theuser 40, for example. The second region 2 f is a portion of the majorsurface 2 d other than the first region 2 e.

As shown in FIGS. 1 and 2, the holes 22 are arranged in multiple rows ina longitudinal direction and in multiple rows in a lateral direction inthe second region 2 f of the seat cushion 2. The outlet 13 c is providedin the first region 2 e. The other ends 22 b of the holes 22 are coupledto an intake duct 23. The intake duct 23 covers the lower surface of thepad 2 b and communicates with each hole 22. The intake duct 23 isprovided with a blower 21. The blower 21 has a fan which is rotated by amotor. Together with the air conditioning device 10 or separately fromthe air conditioning device 10, the motor is controlled by a controller(not shown).

As shown in FIG. 2, the blower 21 sucks air from the intake duct 23 anddischarges the air to the second duct 20. Two second outlets 25 areprovided at a leading end of the second duct 20. When the fan of theblower 21 rotates, the air is sucked from the inlets 22 a through theseat cover 2 c. The air is sucked to the blower 21 through the holes 22and the intake duct 23. The blower 21 discharges the air to the secondoutlets 25 via the second duct 20.

As shown in FIG. 1, the second outlets 25 are located at the lowerregion of the front portion of the seat cushion 2. Specifically, thesecond outlets 25 are respectively provided in the front shield 7 andlocated at both left and right sides of the front portion of the seatcushion 2. The second outlets 25 are opened forward and, preferably,opened toward the back side of the left and right calf of the user 40.

When air is discharged from the air conditioning device 10, the air isblown out toward the user 40 from the first outlets 16 on the sideportion of the seat cushion 2, as shown in FIG. 1 (primary air streamA). As the fan of the blower 21 rotates, the air in the primary airstream A is sucked from the holes 22 (secondary air stream B).Therefore, the air blown out from the first outlets 16 can flow towardthe user 40 by the secondary air stream B without being spread. In thisway, the cold or warm air from the air conditioning device 10 caneffectively cool or warm the user 40.

As shown in FIG. 2, the holes 22 are oriented toward the user 40.Therefore, the air in contact with the user 40 is sucked from the holes22. In this way, during cooling, heat is removed from the user 40through air, and hence, the user 40 can be cooled. The air dischargedfrom the blower 21 is blown out from the second outlets 25 via thesecond duct 20 (tertiary air stream C). The second outlets 25 areoriented toward legs of the user 40. Therefore, when warm air is blownfrom the second outlets 25, the calf of the user can be warmed byreceiving heat from the warm air. When cold air is blown, the calf iscooled by heat being removed by the cold air. Furthermore, the calf canlose its heat by wind.

As shown in FIGS. 1 and 2, a hole 31 penetrating in a thicknessdirection is formed in the pad 3 b of the seat back 3. The hole 31 hasan inlet 31 a facing the seat cover 3 c. A plurality of holes 31 areprovided in a major surface 3 d of the seat back 3. The major surface 3d is a region facing the user 40 when the user 40 is seated on thevehicle seat 1. Specifically, the major surface 3 d is a region potherthan the left and right regions on the front surface of the seat back 3.The left and right regions are bulged forward from the major surface 3d. The major surface 3 d receives a pressure when the user 40 is seated.

As shown in FIGS. 1 and 2, the holes 31 are arranged in multiple rows ina vertical direction and in multiple rows in a lateral direction in themajor surface 3 d of the seat back 3. The other ends 31 b of the holes31 are coupled to an intake duct 32. The intake duct 32 covers the rearsurface of the pad 3 b and communicates with each hole 31. The intakeduct 32 is provided with a blower 30 shown in FIG. 3. The blower 30 hasa fan which is rotated by a motor. Together with the air conditioningdevice 10 or separately from the air conditioning device 10, the motoris controlled by a controller (not shown).

The blower 30 shown in FIG. 3 sucks air from the intake duct 32 shown inFIG. 2 and discharges the air to the second duct 33. Two second outlets34 are provided in a leading end of the second duct 33. When the fan ofthe blower 30 rotates, the air is sucked from the inlets 31 a throughthe seat cover 3 c. The air is sucked to the blower 30 through the holes31 and the intake duct 32. The blower 30 discharges the air from thesecond outlets 34 via the second duct 33.

As shown in FIGS. 1 and 3, the second outlets 34 are located at the leftand right on the upper side of the seat back 3. The upper portion of theseat back 3 faces upward, and left and right headrest brackets 3 f areprovided at the central region of the upper portion. Struts of aheadrest (not shown) are inserted into the headrest brackets 3 f tosupport the headrest relative to the seat back 3. The left and rightsecond outlets 34 are located at the outside of the left and rightheadrest brackets 3 f, respectively. The second outlets 34 are opened tothe front and toward the width center of the seat 1, as shown in FIGS. 1and 3. Preferably, the second outlets are opened toward a neck of theuser 40 from above shoulders of the user 40 seated on the seat 1.

When air is discharged from the air conditioning device 10, the air isblown out toward the user 40 from the first outlets 18 on the sideportion of the seat back 3, as shown in FIG. 1 (primary air stream A).As the fan of the blower 30 rotates, the air in the primary air stream Ais sucked from the holes 31 (secondary air stream B). Therefore, the airblown out from the first outlets 18 can flow toward the user 40 by thesecondary air stream B without being spread. In this way, the cold orwarm air from the air conditioning device 10 can effectively cool orwarm the user 40.

As shown in FIG. 2, the holes 31 are oriented toward the user 40.Therefore, the air in contact with the user 40 is sucked from the holes31. In this way, during cooling, heat is removed from the user 40through air, and hence, the user 40 can be cooled. As shown in FIGS. 1and 3, the air discharged from the blower 30 is blown out from thesecond outlets 34 via the second duct 33 (tertiary air stream C). Thesecond outlets 34 are oriented toward the neck of the user. Therefore,when warm air is blown from the second outlets 34, the neck of the usercan be warmed by receiving heat from the warm air. When cold air isblown, the neck is cooled by heat being removed by the cold air.Furthermore, the neck can also lose its heat by wind. Here, the necktends to feel the temperature, as compared with other regions of thebody. Accordingly, the user can feel to be cooled or warmed withrelatively little energy.

As shown in FIG. 1, the vehicle seat 1 described above includes a seatmain body (the seat cushion 2 and the seat back 3) having the majorsurfaces 2 d, 3 d facing the user 40 seated. As shown in FIGS. 2 and 3,the vehicle seat further includes the first air passage, the outlets 16,18 and the second air passage. The first air passage (the guide duct 11)extends from the air conditioning device 10 of a vehicle toward the seatmain body so as to guide air from the air conditioning device 10 to theseat main body. As shown in FIG. 3, the outlets 16, 18 are provided tothe side portion of the seat main body and opened so that the air fromthe first air passage is blown out along the side portion of the seatmain body. The second air passage (the holes 22, 31 and the intake ducts23, 32) has the inlets 22 a, 31 a opened toward the major surfaces 2 d,3 d such that the air blown out from the outlets 16, 18 is sucked fromthe major surfaces 2 d, 3 d. The air in the second air passage is suckedby the blowers 21, 30.

Therefore, as shown in FIGS. 1 and 2, the air cooled or warmed in theair conditioning device 10 is blown out from the outlets 16, 18 via thefirst air passage. The outlets 16, 18 are configured to blow out the airalong the side portion of the seat main body. Since the air flows alongthe side portion of the seat main body, there occurs a Coanda effectthat air flows along a wall. Thus, the air flows along the side portionof the seat main body and also flows toward the major surfaces 2 d, 3 d.The air blown out from the outlets 16, 18 can be sucked from the inlets22 a, 31 a opened on the major surfaces 2 d, 3 d. Thus, the air blownout can be blown in such a way that the air is directed toward the user40 or goes round the user 40. In this way, the user 40 is enveloped bythe cold air or warm air. This state is similar to a state where theuser 40 is covered by an air curtain. Thus, the user 40 is primarilyeffectively cooled or warmed by the cold air or warm air from the airconditioning device 10 (primary cooling or primary warming).

Furthermore, the air is sucked from the inlets 22 a, 31 a opened on themajor surfaces 2 d, 3 d facing the user 40. Therefore, the air presentin a narrow gap between the user 40 and the major surfaces 2 d, 3 d issucked from the inlets 22 a, 31 a. In this way, it is possible to takeheat from the user 40 through the air. Thus, during cooling, the user 40can be cooled by using the air sucked from the major surfaces 2 d, 3 d(secondary cooling).

As shown in FIGS. 1 and 3, the seat main body has the seat cushion 2configured to support a hip of the user 40 and the seat back 3 providedto a rear portion of the seat cushion 2 and configured to support a backof the user 40. The second outlets 25 are provided in the seat cushion 2such that the air discharged from the blower 21 is blown out to thefront of the seat cushion 2. Generally, a calf of a user is located infront of the seat cushion 2. Therefore, the calf of the user can betertiarily cooled or secondarily warmed by the cold air or warm airblown out from the second outlets 25.

As shown in FIGS. 1 and 3, the second outlets 34 opened forward areprovided in the upper portion of the seat back 3 such that the airdischarged from the blower 30 is blown out forward from the upperportion of the seat back 3. Generally, a neck of a user is located infront of the upper portion of the seat back 3. Therefore, the neck ofthe user 40 can be tertiarily cooled or secondarily warmed by the coldair or warm air blown out from the second outlets 34.

As shown in FIG. 1, the vehicle seat 1 described above includes a seatmain body having the major surfaces 2 d, 3 d and seat outer peripheries2 g, 3 g located at the outer peripheries of the major surfaces 2 d, 3d. The vehicle seat 1 further includes the first air passage, the firstoutlets 16, 18, the second air passage and the second outlets 25, 34, asshown in FIGS. 1 to 3. The first outlets 16, 18 are provided in the seatouter peripheries 2 g, 3 g, so that the air from the first air passageis blown out from the seat outer peripheries 2 g, 3 g. The secondoutlets 25, 34 are configured to blow out the air discharged from theblowers 21, 30 toward the user 40.

Therefore, the air cooled or warmed in the air conditioning device 10 isblown out from the first outlets 16, 18 to the seat outer peripheries 2g, 3 g via the first air passage. The air blown out from the firstoutlets 16, 18 can be sucked from the inlets 22 a, 31 a opened on themajor surfaces 2 d, 3 d. Therefore, the air blown out can be blown tothe user 40 without being greatly spread.

As shown in FIGS. 2 and 3, the air, which is sucked from the inlets 22a, 31 a and discharged from the blowers 21, 30, is again blown outtoward the user. Therefore, the cold air or warm air from the airconditioning device 10 is again utilized for cooling or warming the user(tertiary cooling or secondary warming). Thus, the cold air from the airconditioning device 10 is utilized three times when cooling the user 40.That is, the cold air blown out from the first outlets 16, 18 cools theuser 40, the air sucked from the major surfaces 2 d, 3 d of the seatmain body takes heat from the user 40, and the cold air is additionallyblown to the user 40. The warm air from the air conditioning device 10is utilized two times for warming the user 40. That is, the warm airdischarged from the first outlets 16, 18 warms the user 40 and the warmair sucked from the major surfaces 2 d, 3 d of the seat main body isadditionally blown to the user 40. Thus, the cold air or warm air fromthe air conditioning device 10 can be effectively utilized to cool orwarm the user 40.

As shown in FIG. 1, the vehicle seat 1 includes the seat main body (theseat cushion 2) having the major surface 2 d facing the user 40 seated.The vehicle seat 1 further includes the first air passage, the outlet 13c and the second air passage. The first air passage (the guide duct 11)extends from the air conditioning device 10 of a vehicle toward the seatmain body so as to guide air from the air conditioning device 10 to theseat main body. The outlet 13 c is communicating with the first airpassage and opened toward the first region 2 e of the major surface 2 dthrough the seat main body. The second air passage has the inlet 22 awhich is opened toward the second region 2 f through the seat main bodyso as to suck air from the second region 2 f of the major surface 2 d.The air in the second air passage is sucked by the blower 21.

Therefore, two lines of air stream occur in the seat main body. One lineis an air stream flowing from the air conditioning device 10 to themajor surface 2 d of the seat main body. Another line is an air streamin which air is sucked to the seat main body from the major surface 2 dby the blower 21. In the first region 2 e of the major surface 2 d, thecold air or warm air from the air conditioning device 10 is directlyblown to the user 40. In the second region 2 f of the major surface 2 d,the air in the surroundings of the user 40 is sucked by the second airpassage.

Therefore, during cooling, in the first region 2 e, the cold air fromthe air conditioning device 10 is directly blown to the user 40.Furthermore, the first region 2 e itself can be cooled by the cold air.In the second region 2 f, the air in the surroundings of the user 40 issucked. In this way, it is possible to take heat from the user 40through the air, thereby cooling the user 40. Further, generally, theair conditioning device 10 discharges cold air after a predeterminedtime has elapsed from the start-up. Therefore, in the first region 2 eusing the air conditioning device 10, an effect of cooling the user 40is small immediately after the start-up of the air conditioning device10. After a predetermined time has elapsed, the user 40 can beeffectively cooled by the cold air. On the other hand, in the secondregion 2 f where the air is sucked, since the air sucked takes heat fromthe user 40, the user can be cooled immediately. Thus, the user 40 canbe cooled immediately by the second region 2 f and can be also cooled bythe cold air from the first region 2 e after a predetermined time haselapsed.

During warming, in the first region 2 e, the warm air from the airconditioning device 10 is directly blown to the user 40. Furthermore,the first region 2 e itself can be warmed by the warm air. The air inthe surroundings of the user 40 is sucked in the second region 2 f.Therefore, heat is removed from the user 40 through the air. In thisway, a temperature difference between the first region 2 e and thesecond region 2 f, which is felt by the user 40, is increased.Generally, when there is a temperature difference, the warmth in thefirst region 2 e can be more strongly felt. Therefore, it is possible toallow the user 40 to strongly feel the warmth.

When the user 10 is seated on the seat main body, the pressure which thefirst region 2 e receives from the user 10 is higher than a pressurewhich the second region 2 f receives from the user 10. Generally, in ahigher pressure region, more energy is necessary when the air is suckedthan when the air is blown out. Therefore, the air is blown out from thefirst region 2 e which receives a relatively high pressure, and the airis sucked in the second region 2 f which receives a lower pressure. Inthis way, the air can be blown out from and sucked in the major surface2 d with relatively small energy.

The seat main body has the seat cushion 2 configured to support a hip ofthe user 40 and the seat back 3 provided to a rear portion of the seatcushion 2 and configured to support a hack of the user 40. The firstregion 2 e is located at the rear portion of the seat cushion 2 andunder the hip of the user 40. Generally, the first region 2 e under thehip receives a relatively high pressure. Further, in the regionreceiving a higher pressure, more energy is necessary when the air issucked than when the air is blown out. Therefore, the air is blown outfrom the first region 2 e which receives a relatively high pressure, andthe air is sucked in the second region 2 f which receives a lowerpressure. In this way, the air can be blown out from and sucked in themajor surface 2 d with relatively small energy.

Although the embodiment of the present disclosure has been describedwith reference to the above-described structure, it is apparent to thoseskilled in the art that many substitutions, improvements andmodifications can be made without departing from the object of thepresent disclosure. Therefore, the embodiment of the present disclosurecan include all of the substitutions, improvements and modificationswhich do not depart from the spirit and object of appended claims. Forexample, the embodiment of the present disclosure is not limited to theabove-described structure but can be modified as follows.

As described above, an air flowing structure for generating the primaryair stream A, the secondary air stream B and the tertiary air stream Cis provided to each of the seat cushion 2 and the seat back 3. Insteadof this, an air flowing structure may be provided to only one of theseat cushion 2 and the seat back 3.

The second air passage has the holes 22, 31 of the pads 2 b, 3 b and theintake ducts 23, 32, as shown in FIG. 2. The second air passage may havea pipe penetrating the pads 2 b, 3 b, instead of the holes 22, 31. Thesecond air passage may have a groove which is formed in the pads 2 b, 3b for communicating respective holes 22, 31, instead of the intake ducts23, 32.

As shown in FIGS. 1 and 3, the second outlets 25 are provided in thefront portion of the seat cushion 2 and opened forward such that the airdischarged from the blower 21 is blown out toward the calf of the user40. Instead of or in addition to this, the second outlets may beprovided in the seat cushion 2 such that the air is blown out toward theother portions of the user. For example, the second outlets may beprovided to the side portion of the seat cushion 2 and have an openingopened upward such that the air is blown out toward the arms of theuser. In order to blow out the air toward the back of the knee of theuser, the second outlets may be provided to the side portion or thefront portion of the seat cushion 2 and have an opening opened upward.

As shown in FIGS. 1 and 3, the second outlets 34 are provided in theleft and right on the upper side of the seat back 3 and opened to thefront and toward the width center such that the air discharged from theblower 30 is blown out toward the neck of the user 40. Instead of or inaddition to this, the second outlets may be provided in the seat back 3such that the air is blown out toward the other portions of the user.For example, the second outlets may be provided in the rear portion ofthe seat back 3 and have an opening opened forward such that the air isblown out toward the arms of the user.

As shown in FIGS. 1 and 3, the second outlets 25, 34 are configured toblow out the air discharged from the blowers 21, 30 toward the user 40seated on the seat 1. Instead of or in addition to this, the seat 1 maybe provided with the second outlets for blowing out the air toward theseat 1 or a rear user seated on a rear seat located on the rear of theseat main body. For example, the second outlets may be provided in therear portion of the seat cushion 2 and have an opening opened rearward.The second outlets may be provided in the lower portion of the seat back3 and have an opening opened rearward.

As shown in FIGS. 1 and 3, the first outlets 16, 18 for primarilyblowing out the air supplied from the air conditioning device 10 areprovided to the side portion of the seat cushion 2 or the seat back 3.Instead of or in addition to this, the first outlets may be provided tothe other portions of the seat outer peripheries 2 g, 3 g of the seatcushion 2 or the seat back 3. For example, the first outlets may beprovided to the front portion of the seat cushion 2 to blow out the airupward along the front portion. The first outlets may be provided in theupper portion of the seat back 3, for example, at the same position asor in proximity to the second outlets 34 to blow out the air forwardalong the upper portion.

A heater having a heating wire may be provided in the seat cushion 2and/or the seat back 3. The heater can be provided between the pads 2 b,3 b and the seat covers 2 c, 3 c. Generally in order to discharge thewarm air, the air conditioning device 10 requires a predetermined timefrom the start-up. By using the heater during the predetermined time,the seat cushion 2 or the seat back 3 can be relatively quickly warmed.When the warm air is discharged from the air conditioning device 10, theheater may be utilized. In this case, the air sucked from the holes 22,31 is warmed by the heater. Therefore, the air temperature of thetertiary air stream C, which is sucked from the holes 22, 31 anddischarged from the second outlets 25, 34, is increased. Thus, the usercan be reliably warmed by the tertiary air stream C.

As described above, the seat cushion 2 is provided with the outlet 13 copened toward the first region 2 e of the major surface 2 d. The firstregion 2 e is located under the hip of the user 40. Instead of or inaddition to this, the seat cushion may be provided with an outlet openedtoward the other regions of the major surface 2 d. For example, theoutlet may be provided in a region (first region) of the major surface 2d, which is located under the calf of the user 40. In this way, the coldair or warm air from the air conditioning device 10 can be directlyblown to the calf of the user 40. Here, the region located under thecalf is a region which receives, from the user 40, a pressure higherthan that of the other regions of the major surface 2 d.

The seat cushion 2 is provided with the outlet 13 c opened toward thefirst region 2 e of the major surface 3 d. Instead of or in addition tothis, the seat back 3 may be provided with an outlet opened toward themajor surface 3 d. For example, the seat back may be provided with theoutlet opened toward a region corresponding to a waist of a user. Inthis way, the cold air or warm air from the air conditioning device 10can be directly blown to the waist of the user 40. Here, the regioncorresponding to the waist is a region which is receives, from the user40, a pressure higher than that of the other regions of the majorsurface 3 d.

What is claimed is:
 1. A vehicle seat comprising: a seat main bodyhaving a seat cushion and a seat back, wherein each of the seat cushionand the seat back has outer peripheral surfaces and a major surfaceprovided between the outer peripheral surfaces, and the major surfaceextends in a lateral direction of the vehicle seat and faces a user tobe seated; a first air passage extending from an air conditioning deviceof a vehicle toward at least one of the seat cushion and the seat backso as to guide air from the air conditioning device to the at least oneof the seat cushion and the seat back; an outlet communicating with thefirst air passage, the outlet being provided at and opened toward afirst region of the major surface through the at least one of the seatcushion and the seat back; a second air passage having an inlet which isprovided at and opened toward a second region of the major surfacethrough the at least one of the seat cushion and the seat back so as tosuction air from the second region; and a blower configured to suctionair in the second air passage, wherein the first region and the secondregion are located at a center of the major surface of at least one ofthe seat cushion and the seat back in the lateral direction of thevehicle seat, the second region extends beyond the first region in thelateral direction of the vehicle seat toward the outer peripheralsurfaces of the at least one of the seat cushion and the seat back, andwhen the user is seated on the seat main body, the first region and thesecond region receive a seated pressure from the user.
 2. The vehicleseat according to claim 1, wherein the seat cushion is configured tosupport a hip of the user to be seated and the seat back is provided toa rear portion of the seat cushion and configured to support a back ofthe user to be seated, and the first region is located at the rearportion of the seat cushion and under the hip of the user when the useris seated.
 3. The vehicle seat according to claim 1, wherein the seatcushion is configured to support a hip of the user to be seated and theseat back is provided to a rear portion of the seat cushion andconfigured to support a back of the user to be seated, and the firstregion is located at a rear central region of the rear portion of theseat cushion.